61018 has 4 divisors (see below), whose sum is σ = 91530. Its totient is φ = 30508.

The previous prime is 61007. The next prime is 61027. The reversal of 61018 is 81016.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 61009 + 9 = 247^2 + 3^2 .

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 60992 and 61010.

It is an unprimeable number.

61018 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15253 + ... + 15256.

2⁶¹⁰¹⁸ is an apocalyptic number.

61018 is a deficient number, since it is larger than the sum of its proper divisors (30512).

61018 is a wasteful number, since it uses less digits than its factorization.

61018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30511.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 61018 is about 247.0182179516. The cubic root of 61018 is about 39.3688434147.

It can be divided in two parts, 6 and 1018, that added together give a 10-th power (1024 = 2¹⁰).

The spelling of 61018 in words is "sixty-one thousand, eighteen".